Spin dynamics of (Pr0.5-xCex)Ca0.5MnO3 (x=0.05, 0.10, and 0.20) system studied by muon spin relaxation J. Appl. Phys. 112, 073911 (2012) Slow magnetic dynamics in the K3M3IIM2IIIF15 multiferroic system J. Appl. Phys. 112, 073908 (2012) Exchange bias coupling of Co with ultrathin La2/3Sr1/3MnO3 films Appl. Phys. Lett. 101, 122409 (2012) Fabricating high-density magnetic storage elements by low-dose ion beam irradiation Appl. Phys. Lett. 101, 112406 (2012) Thermal stability and the magnetic properties of hybrid vanadium oxide-tetradecylamine nanotubes A temperature-dependent study of the four Raman-active phonons in MnF 2 and FeF 2 has shown that their Raman frequencies and intensities are affected to varying extents by the antiferromagnetic ordering. A theory for spin-dependent effects in rutile structure antiferromagnets has been developed to calculate the anomalous variation in the phonon frequency and to estimate the corresponding spin-phonon coupling coefficients.

The dynamical properties of uniform two-dimensional arrays of nickel nanowires have been investigated by inelastic light scattering. Multiple spin waves are observed that are in accordance with dipole-exchange theory predictions for the quantization of bulk spin waves. This first study of the spin-wave dynamics in ferromagnetic nanowire arrays reveals strong mode quantization effects and indications of a subtle magnetic interplay between nanowires. The results show that it is important to take proper account of these effects for the fundamental physics and future technological developments of magnetic nanowires.

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The spin dynamics of high-aspect-ratio nickel nanorings in a longitudinal magnetic field have been investigated by Brillouin spectroscopy and the results are compared with a macroscopic theory and three-dimensional micromagnetic simulations. Good agreement is found between the measured and calculated magnetic field dependence of the spin wave frequency. Simulations show that as the field decreases from saturation, the rings switch from a "bamboo" to a novel "twisted bamboo" state at a certain critical field, and predict a corresponding dip in the dependence of the spin wave frequency on the magnetic field.